package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

/**
 * @PROJECT_NAME:sky-take-out
 * @NAME: ShoppingCartServiceImpl
 * @AUTHOR:$$
 * @Date:2023-08-19
 * @DESCRIPTION:
 **/
@Service
public class ShoppingCartServiceImpl  implements ShoppingCartService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 添加购物车
     * @param shoppingCartDTO
     */
   public void addShoppingCart(ShoppingCartDTO shoppingCartDTO){
       ShoppingCart shoppingCart =
               new ShoppingCart();
       BeanUtils.copyProperties(shoppingCartDTO ,shoppingCart);
       //只能查询自已的购物车
       shoppingCart.setUserId(BaseContext.getCurrentId());
      //判断当前商品是否在购物车中
       List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);

         if (shoppingCartList != null && shoppingCartList.size() ==1){
             //如果已经存在，就更新数量，数量加1
             shoppingCart = shoppingCartList.get(0);
             shoppingCart.setNumber(shoppingCart.getNumber()+1);

             shoppingCartMapper.updateNumberById(shoppingCart);
         }else {
             //如果不存在，插入数据，数量就是1

             //判断当前添加到购物车的是菜品还是套餐
             Long dishId = shoppingCartDTO.getDishId();
             if (dishId !=null){
               //添加到购物车的菜品
                 Dish dish = dishMapper.getById(dishId);
                 shoppingCart.setName(dish.getName());
                 shoppingCart.setImage(dish.getImage());
                 shoppingCart.setAmount(dish.getPrice());
             }else {
                 //添加到购物车的套餐
                 Setmeal setmeal =
                         setmealMapper.getById(shoppingCartDTO.getSetmealId());
                   shoppingCart.setName(setmeal.getName());
                   shoppingCart.setImage(setmeal.getImage());
                   shoppingCart.setAmount(setmeal.getPrice());
             }
             shoppingCart.setNumber(1);

             shoppingCart.setCreateTime(LocalDateTime.now());
             shoppingCartMapper.insert(shoppingCart);
         }


   }

    /**
     * 查看购物车
     * @return
     */
    @Override
    public List<ShoppingCart> showShoppingCart() {
        return shoppingCartMapper.list(ShoppingCart.builder().userId(BaseContext.getCurrentId()).build());
    }

    /**
     * 清空购物车商品
     */
    public void cleanShoppingCart(){
       shoppingCartMapper.deletByUserId(BaseContext.getCurrentId());
    }

}
